GARDENA Pressure Hoses & Connectors Reducer nipple 630245 - GARDENA 07266-20, The GARDENA 07266-20 brass reducer nipple features an external thread of 33.25 mm (1 inch) and an internal thread of 39.0 mm (1 1/4 inch). This threaded brass nipple acts as a tube-connector adapter, making it suitable for connecting pipes of differing diameters. Commonly used in plumbing and irrigation systems, it provides a reliable and durable solution for reducing pipe sizes. GARDENA 07266-20 Brass Reducer Nipple 33.3mm OT to 39mm IT Threads